Relationship between an index of brown adipose tissue density in the supraclavicular region and leg muscle strength

The aim of this study was to investigate the relationship between brown adipose tissue density (BAT-d) and muscle strength, one of the major parameters relating to physical fitness. The total hemoglobin concentration ([Total-Hb]) , an index of BAT-d in the supraclavicular region using near-infrared time-resolved spectroscopy, handgrip strength, and leg-extension strength were measured in winter in healthy adults (n = 27). BAT-d was not correlated with handgrip strength (r = 0.18, p = 0.37), but with 1-RM leg extension (r = 0.41, p < 0.05). A higher leg muscle strength was associated with a higher BAT-d.